# SPD3303X Siglent DC Power Supply New ### Key Features at a Glance - **Architecture:** Linear regulation, 3-channel - **CH1 / CH2:** 0-32 V / 0-3.2 A each, parallel or series tracking - **CH3 (auxiliary):** 2.5 / 3.3 / 5 V selectable, up to 3.2 A - **Resolution:** 10 mV / 10 mA programming and readback - **Ripple:** 350 µV rms typ. (main channels) - **Regulation:** ≤ 0.01% + 3 mV load and line - **Protection:** OVP, OCP, OTP per channel - **Display:** 2.8 inch TFT - **Remote:** SCPI / LabVIEW / IVI; LAN, USB, GPIB via adapter ## About the Siglent SPD3303X In summary, the Siglent SPD3303X is a three-channel linear DC power supply with two fully isolated 0-32 V / 0-3.2 A programmable channels (Channel 1 and Channel 2) and a fixed selectable 2.5 V / 3.3 V / 5 V auxiliary channel (Channel 3) at up to 3.2 A. Per the datasheet, both main channels feature 10 mV / 10 mA programming resolution, 350 µV rms typical output ripple, independent / parallel / series tracking modes, and overvoltage / overcurrent / overtemperature protection. The SPD3303X ships with a 2.8 inch TFT display. The SPD3303X variant adds remote-control programmability over USB Device and LAN, with optional USB-GPIB adapter for IEEE-488 control. The SPD3303X-E variant is the bench-only sibling, which does not include LAN and uses a simpler LCD display. ### What is the Siglent SPD3303X used for? The SPD3303X is used for general-purpose bench DC power for prototype bring-up, education, repair benches, and small-scale production verification. The dual 32 V / 3.2 A channels cover the most common analog and digital rails up to 60 V in series mode or 6.4 A in parallel mode, while the selectable 2.5 V / 3.3 V / 5 V auxiliary channel handles the standard logic rails. Per the datasheet, load and line regulation are each under 0.01% + 3 mV on the main channels, and output noise is typically 350 µV rms — suitable for general analog and digital work though not for the most stringent low-noise RF or audio applications. ### How does the SPD3303X compare to a switching DC supply? The SPD3303X uses linear regulation, dissipating excess voltage as heat in a series-pass element. Linear regulation produces very low output ripple and very low high-frequency switching noise — valuable for analog, sensor, and educational work where supply-induced noise could mask the measurement of interest. The trade-off is lower efficiency and a heavier chassis at comparable output power versus a switching supply. The SPD3303X is the right choice when the customer needs clean DC for a noise-sensitive bench; it is not appropriate for high-power motor or industrial loads. ### Where does the SPD3303X fit in an electronics lab? - Prototype bring-up: 0-32 V / 0-3.2 A on Channel 1, second rail on Channel 2, and a selectable 2.5 V / 3.3 V / 5 V auxiliary logic rail on Channel 3. - Education benches that need an affordable, durable multi-output supply with front-panel encoders and per-channel protection. - Repair and service depots needing a flexible bench supply with parallel mode (up to 6.4 A) and series mode (up to 60 V) on the two main channels. - Production verification fixtures using the auxiliary rail for logic supply on a DUT alongside one of the variable-output channels. - Automated test scripts and characterization sweeps over LAN or USB; SCPI / LabVIEW / IVI programmability with optional GPIB adapter. ## Accessories Supplied Per the manufacturer datasheet, the standard ship kit includes: a Quick Start guide, a region-appropriate AC power cord, and a USB cable. Optional accessories include test leads, a rack-mount kit, and SCPI / IVI driver downloads from the manufacturer. ## Core Specifications ### Channel Layout and Output Range Architecture Linear regulation, 3-channel Channel 1 / Channel 2 0-32 V / 0-3.2 A each, independent, parallel, or series tracking Channel 3 (auxiliary) Selectable 2.5 V, 3.3 V, or 5 V; up to 3.2 A Total maximum output power approximately 195 W Programming resolution 10 mV / 10 mA Readback resolution 10 mV / 10 mA ### Regulation, Accuracy, and Noise Load regulation, voltage / current ≤ 0.01% + 3 mV / ≤ 0.01% + 3 mA (CV / CC) Line regulation, voltage / current ≤ 0.01% + 3 mV / ≤ 0.01% + 3 mA Programming accuracy, voltage / current ≤ 0.05% + 20 mV / ≤ 0.1% + 10 mA Readback accuracy, voltage / current ≤ 0.05% + 20 mV / ≤ 0.1% + 10 mA Output ripple and noise, rms / peak-peak 350 µV rms typ. / 5 mV peak-peak typ. Recovery time after step load change < 50 µs typical Temperature coefficient ≤ 100 ppm/°C voltage, ≤ 200 ppm/°C current ### Protection, Tracking, and Display Overvoltage / overcurrent / overtemperature protection Yes, per channel Front-panel lock Yes Tracking modes between CH1 and CH2 Independent, Parallel, Series Parallel mode maximum current Up to 6.4 A at 32 V Series mode maximum voltage Up to 64 V at 3.2 A Display 2.8 inch TFT ### Interface, Remote Control, and General Front-panel controls Per-channel encoders, multi-window display, numeric keypad USB / LAN USB Host + USB Device / 10/100 Base, RJ-45 Remote protocols SCPI / LabVIEW / IVI over USB-TMC, VXI-11, Socket, Telnet; GPIB via USB-GPIB adapter Dimensions (W×H×D, approx.) 234 × 156 × 314 mm Weight (net, approx.) approx. 8.5 kg (18.7 lb) AC source 100-240 V, 50/60 Hz; auto-sensing Operating temperature / humidity 0 to 40 °C; ≤ 80% RH at 40 °C, non-condensing Safety / EMC / RoHS EN 61010-1; EN 61326-1; 2011/65/EU #### Note on Variant Differences The SPD3303X is the programmable variant with USB Device and LAN interfaces and a TFT display; the SPD3303X-E is the bench-only variant without LAN, with a simpler LCD display. Both variants share identical channel layout, regulation, and protection specifications. Choose the SPD3303X for ATE integration; choose the SPD3303X-E for cost-sensitive bench, education, and repair applications. This webpage was written by a human with an A.I. "Intern", which may contain errors. Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer. ## Details - **Price:** 631.0 USD - **Vendor:** Siglent - **Type:** DC SUPPLY - **Tags:** DC Power Supply, Manufacturers, New, Power Supplies & Loads, Siglent ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 631.00 USD | In stock | ## Images - SPD3303X Siglent DC Power Supply --- > Source: [ValueTronics](https://valuetronics.com/products/spd3303x-siglent-dc-power-supply-new) > Updated: 2026-05-21